package top.hzy520.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "EncodingFilter")
public class EncodingFilter implements Filter {
    private String encode;
    public void destroy() {
        System.out.println("拦截器被销毁");
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request= (HttpServletRequest) req;
        HttpServletResponse response= (HttpServletResponse) resp;
        request.setCharacterEncoding(encode);
        response.setContentType("text/html;charset="+encode);
        chain.doFilter(req, resp);
    }

    public void init(FilterConfig config) throws ServletException {
        System.out.println("拦截器被初始化");
     encode=config.getInitParameter("encoding");
    }

}
